How to read an audio file from IsolatedStorage?

Question

I have an audio file stored in IsolatedStorage..

I want to access it by calling a method of another class:

using (IsolatedStorageFile isolatedStorage = IsolatedStorageFile.GetUserStoreForApplication()) { using (IsolatedStorageFileStream fileStream = isolatedStorage.OpenFile(filePath, FileMode.Open, FileAccess.Read)) { return fileStream; } }

now when I call that method this way:

var fileStream = Musics.TryGetMusic("DaDaDa.mp3"); musicMediaElement.SetSource(fileStream); musicMediaElement.Play();

I get an error saying it cannot read a closed file.

The cause is that I'm using using statement and the file is closed when I call Play(). How can I solve this problem?

Tigran · Accepted Answer · 2013-09-25 15:10:52Z

1

It's because, I presume yo call it, like

.... using (IsolatedStorageFileStream fileStream = isolatedStorage.OpenFile(filePath, FileMode.Open, FileAccess.Read)) { return fileStream; } ....

After exiting from the using statement, fileStream instance will be disposed.

To resolve this issue should be enough to not use using here,but instead track that instance lifetime and call dispose manually in appropriate place.

answered Sep 25, 2013 at 15:10

Tigran

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4 Comments

user2799350 Over a year ago

thanks @Tigran. How can I dispose it manually while that is a method of another class (helper) Musics.TryGetMusic() and I have not access to it anymore?

Tigran Over a year ago

@user2799350: You return it to caller. So caller can take care of tracking it.

user2799350 Over a year ago

So in my question above, I should dispose later var fileStream =....

Tigran Over a year ago

@user2799350: exactly. when you finish using it and you no more need it (in your case probably after Play(..)), call dispose on it.

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